Capstan



B. E. BALDUF.

CAPSTANl APPLICATION man Nov. 9, 191s.

Patented Aug'. WZL

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:BRUNO E. BALDUF, OF CHICAGO, ILLINOIS, ASSIGNOR T0 WESTERN ELECTRIC COM- PANY, INCORPORATED, OF NEW YORK,

N. Y., A CORPORATION OIE' NEW YORK.

GAPSTAN.

Specification of Letters Patent.

)Patented Auw. 9, 1921.

Application led November 9, 1918. Serial No. 261,836.

To all whom t may concern.'

Be it known that I, BRUNO E. BALDUF, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in capstans, of which the following is a full, clear, concise, and exact description.

This invention relates to capstans for use in wire drawing machines and has for its object to provide a capstan simple in structure, easily repaired, and economical in the use of material.

In wire drawing operations grooves are worn in the face of the capstan by the wire and in order to obtain the best results it is necessary to repair the capsta-n frequently by smoothing off its surface which contacts with the wire.

In accordance with the general features of this invention the capstan is constructed of a plurality of separate parts mounted upon a common shaft from which they may be easily removed for repair or replacement. The part over which the wire is drawn is preferably a hardened steel disk which may be repeatedly ground or turned downV as the surface becomes grooved.

In the drawings in which the features of this invention are illustrated in connection with a compound capstan Figure 1 is a plan view;

F ig. 2 is a front elevation thereof, and

Fig. 3 is an enlarged horizontal cross section of a portion of Fig. 1.

As shown in the drawings, the compound capstan embodying the features of this invention consists of a plurality of hardened steel capstan disks 10--10 and a plurality of steel spacer Vdisks 11-11 alternately mounted on a supporting shaft 12. The shaft 12 has an enlarged diameter intermediate its ends which forms a shoulder 13 against which the capstan 10 is placed. As shown, the capstans 10-10 and the spacers 11-11 are of graduated diameters. rIhe shoulder 13 and the spacers 11-11V are slightly larger in diameter than the adjoining capstans 10-10 and form retaining pockets for the wire which is drawn over the faces of the capstans 10-10. The capstans 10-10 and the spacers 11-11 are keyed onto the shaft 12 as indicated at 14 and are held tightly in place by a nut 15 screw threaded onto the shaft 12.

In the process of drawing wire there is a slipping action on the capstan of the wire being drawn, due to the unequal elongation of the wire, which action wears grooves in the face of the capstan. When this happens in the case of a solid one-piece capstan which cannot be repaired the capstan is discarded and replaced with a new one, which results in a waste of material. In a construction where a steel face ring is shrunk on a casting and grooves are worn in the face of the ring, the ring is removed and discarded and another ring .is shrunk in place on the casting. In this case there is a waste of material and also considerable time consumed in makingh the change.

Vllhen grooves are worn in the face of the capstan 10-10 as constructed in this invention the spacers 11-11 are retained and the capstans 10-10 are ground down till the grooves are removed, after which they are rehardened. The spacers can be used indefinitely and the grinding of the capstan faces can be repeated as often as is necessary until they have been ground down to the diameter of the smallest capstan. This results in a great saving of metal since a new capstan will only be required when the smallest diameter capstan is ground down to a size which is not suitable for use. When this happens, the remainder of the capstans will be moved down one step and a. new capstan of the larges diameter will be added. A,

That is claimed is:

1. In a compound capstan, a plurality of hardened metal wire drawing disks of graduated diameters, and combined spacing and retaining members therefor having straight faces disposed at right angles to the faces of the drawing` disks whereby said disks may be reground and interchanojed without changing the spacing and retaining members.

2. In a compound capstan, a plurality of wire drawing disks of graduated diameters, combined spacing and retaining members having straight side faces against which the side faces of the disks bear to form a right-angled channel, and a shaft upon which said disks and spacers are removably mounted.

In witness whereof, I hereunto subscribe my name this 23rd day of October A. D., 1918. 

